JP3673030B2 - Water stop material and its water stop structure - Google Patents

Description

【００３４】
表より、実施例では位置修正時における部材の分離性や横滑り性等の移動性が良好で、止水材を異常変形させることなく容易に位置修正できると共に、組立後の水シール性にも優れていることがわかる。
【図面の簡単な説明】
【図１】止水材例の断面図
【図２】他の止水材例の断面図
【図３】さらに他の止水材例の断面図
【図４】止水構造例の断面図
【図５】他の止水構造例の断面図
【図６】さらに他の止水構造例の断面図
【符号の説明】
６：止水材
１：易水溶層
２：発泡体層
３、４：粘着層
５：滑膜コート
７：下地材
８：外壁材
１０：ガスケット
１１：基礎
１２：土台
１３：フード[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a water-stopping material that is excellent in mountability between members and sealing performance and is suitable for a water seal of a building and the like and a water-stopping structure thereof.
[0002]
[Prior art]
Conventionally, there has been known a waterstop material obtained by attaching an adhesive layer to a foam. This is designed to be installed between members for buildings and water-sealed, and bonded to one member via an adhesive layer, and the other member to compress the foam to achieve water-sealing. . However, there is no problem in water sealing because the adhesive layer is in close contact with the member through the adhesive layer, but the other side is in contact with the member through the compression repulsion force of the foam, so the water seal is insufficient. There was a problem. When the member is made of a rough surface, water leakage is particularly significant.
[0003]
In view of the above, there is an attempt to use a water-stopping material in which an adhesive layer is provided on both surfaces of a foam, but when the other member is aligned with one member, the adhesive layer is the other before the alignment is completed. When it is peeled off, the water-stopping material may be peeled off from one member, causing the position to be misaligned, or the other member may be aligned with the adhesive layer adhered and the water-stopping material may be twisted. Work mistakes tend to occur frequently, and the reliability of the water seal is inferior.
[0004]
It may be possible to align the member with the separator temporarily attached to the adhesive layer. In this case, however, the separator needs to be peeled and removed after setting the member. Misalignment due to peeling with the material frequently occurs, and the reliability of the water seal is further lowered.
[0005]
[Technical Problem of the Invention]
The present invention provides a water-stop material and a water-stop structure that can be easily mounted between members without causing twisting or misalignment, has excellent workability, has excellent water-sealability, and has high reliability in sealing treatment. Development is an issue.
[0006]
[Means for solving problems]
The present invention, at least the foam layer and Ri Na has a readily water layer, member water stopping material, and the water stopping material, characterized in Rukoto that readily water layer having a synovial coated on the outer surface The present invention provides a waterstop structure characterized by being disposed between and water-sealed.
[0007]
【The invention's effect】
According to the present invention, by having an easily water-soluble layer, it can be prevented from adhering to the member at the time of mounting between the members, or a large frictional force can be generated between the members, such as twisting or misalignment of the water-stopping material. The member can be easily aligned without causing an arrangement error, and the workability is excellent. On the other hand, if water enters, the easily water-soluble layer absorbs the water and quickly becomes thickened, improving the adhesion regardless of the smoothness of the mating member and the surface state of the rough surface. To express. As a result, a water stop structure in which various members are water-sealed with high reliability can be easily formed.
[0008]
In addition, if an adhesive layer, particularly a butyl adhesive layer, is present between the foam layer and the easily water-soluble layer, moderate cushioning properties can be imparted and workability is improved. The layer is exposed and adhered to the member to exhibit a water stop effect, and a more reliable water seal is achieved. Furthermore, the water-stopping material of the present invention can achieve a water seal with excellent reliability even by a method of press-fitting between existing members, and can adopt a mounting method that is difficult to apply with conventional water-stopping materials. it can.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The water-stopping material of the present invention has a foam layer and an easily water-soluble layer having a synovial coat provided on the outer surface, and has an adhesive layer between them if necessary. Examples thereof are shown in FIGS. 1, 2, and 3. 1 is an easily water-soluble layer, 2 is a foam layer, 3 and 4 are adhesive layers, and 5 is a synovial membrane coat. In FIG. 1, a type having a water-soluble layer directly on the foam layer (synovial film not shown) is shown . In FIG. 2, an adhesive layer is provided only on one side of the foam layer, and a synovial film is coated on the water-soluble layer. FIG. 3 illustrates a type having an adhesive layer, an easily water-soluble layer, and a synovial coat on both sides of the foam layer. In the present invention, the easily water-soluble layer, the adhesive layer, and the synovial film coat may be provided on one or both sides of the foam layer, and the form thereof is appropriately determined according to the application place of the water-stopping material, the surface state of the member, and the like. Is done.
[0010]
Accordingly, as shown in FIG. 3, in the case where the foam layer has adhesive layers on both sides, the adhesive layer covered with the easily water-soluble layer may be only on one side, or the adhesive layers on both sides may be covered with the easily water-soluble layer. It may be. These are preferably used when, for example, a water seal between the rough surface members or an intermediate member such as a rubber sheet is used in combination. In that case, the former can be preferably applied with a construction method in which the other member is placed after the water-stopping material is positioned and fixed by adhering to one member via an adhesive layer having no easily water-soluble layer, and the latter is an existing member. A construction method or the like that is press-fitted in between can be preferably applied. Of course, it is not limited to these construction methods.
[0011]
The water-stopping material of the present invention can be the same as the conventional one except that the easily water-soluble layer is disposed at the water-stopping target location. Accordingly, appropriate materials can be used for the foam layer and the adhesive layer. By the way, as the foam layer, for example, polyolefin foam or urethane foam made of ethylene / propylene copolymer or ethylene / propylene / diene copolymer (EPDM), silicone foam or acrylic foam, butyl rubber foam or SBR. Examples thereof include those made of a polyurethane foam, an NR foam, an NBR foam, and a blend foam of these polymers. In particular, a foam made of EPDM foam can be preferably used from the viewpoint of water resistance and light weight.
[0012]
The thickness of the foam layer can be appropriately determined according to the application location of the water-stopping material, the compressibility by the expansion ratio, and the like. Generally, a thickness of 100 mm or less, especially 0.1 to 50 mm, especially 1 to 30 mm is used. The expansion ratio is generally 2 to 100 times, especially 3 to 50 times, particularly 5 to 30 times. The foam layer may have either a closed cell structure or an open cell structure, but a closed cell structure is preferred from the viewpoint of water sealing. In the case of an open-cell structure, it is necessary to compress and arrange in a water-blocking state.
[0013]
The adhesive layer can also be formed of an appropriate water-resistant adhesive substance, and any of known water-resistant adhesives such as rubber, acrylic, and silicone can be used. In particular, a butyl rubber-based pressure-sensitive adhesive can be preferably used from the viewpoint of water sealability. The thickness of the adhesive layer can be appropriately determined according to the application location of the water-stopping material such as the surface roughness of the member, and is generally 5 mm or less, especially 0.1 to 3 mm, especially 0.2 to 2 mm. The When providing an adhesive layer on both surfaces of a foam layer, the kind of adhesive layer may differ in the front and back.
[0014]
The adhesive layer can be formed by an appropriate method such as a coating method, an extrusion method, or a calendar method. Further, it can be laminated on the foam layer by an appropriate method such as a direct molding method on the foam layer or an adhesive method of the sheet-like adhesive layer. In that case, you may form an adhesion layer using a double-sided adhesive sheet. The adhesive surface of the foam layer with the pressure-sensitive adhesive layer can be subjected to appropriate adhesive strength improving treatment such as corona discharge treatment or flame exposure. In addition, appropriate additives, such as an antioxidant and a filler, can be mix | blended with a foam layer and an adhesion layer as needed.
[0015]
The easily water-soluble layer can be formed of an appropriate material that easily dissolves in water, such as polyvinyl alcohol or carboxymethyl cellulose. In the case of polyvinyl alcohol, it is not necessary to have a high saponification degree, and those having a low saponification degree of about 50 to 70% can be used. The thickness of the easily water-soluble layer can be appropriately determined according to the dissolution rate in water and the like, but is generally 500 μm or less, especially 5 to 200 μm, particularly 10 to 100 μm. The attachment of the easily water-soluble layer on the adhesive layer can be performed by an appropriate method such as a film laminating method or a melt extrusion method on the adhesive layer.
[0016]
Against the outer surface of the readily water layer is Ru provided synovial coat 5 as shown in FIG example. The purpose of the synovial membrane coating is to reduce the contact resistance between the easily water-soluble layer and the member to make it slippery and to improve workability. Therefore, in the case of a water-stopping material in which a press-fitting construction is performed between existing members, adhesive layers 3 and 4 are provided on both surfaces of the foam layer 2 as illustrated in FIG. What provided the coat 5 was preferable.
[0017]
For the formation of the synovial membrane coat, for example, an appropriate release agent such as a long-chain alkyl group, a silicone group, or a fluorine group is used. In the case of a synovial film made of a release agent, when having an adhesive layer with an adhesive surface exposed on the opposite side of the foam layer, it can be wound into a roll using the releasability of the synovial film, Overlaying can be performed, and it is possible to avoid the need to temporarily cover the exposed adhesive surface with a separator in order to facilitate rewinding and the like.
[0018]
The formation of the synovial film can be performed by an appropriate method such as a method of applying a forming material on the easily water-soluble layer, and the method of laminating on the adhesive layer as an easily water-soluble film provided with a synovial film coat. Can also form a water stop material. The thickness of the synovial membrane coat is generally 100 μm or less, and in particular, 1 to 50 μm, but may be appropriately determined within a range that does not inhibit the water solubility of the easily water-soluble layer.
[0019]
The waterstop material of the present invention can be used in an appropriate form such as a sheet intended to adhere to the entire surface of the application site, or a tape having a predetermined width intended to partially adhere to the application site. it can.
[0020]
In addition, the water-stopping material can be easily disposed between appropriate members to easily form a water-stopping structure with excellent water seal reliability. There is no limitation in particular about the member of the application object, For example, it can apply to the location which consists of appropriate members which require water seals, such as a building.
[0021]
By the way, the water stop structure formed by arranging the water stop material of the present invention in FIGS. In the water stop structure illustrated in FIG. 4, the water stop material 6 is arranged between the base material 7 and the outer wall material 8 in the joint portion 81 of the outer wall material 8. This is because the gasket 10 is attached to the joint 81 to perform the main sealing process, and in order to improve the reliability of the water seal, the water sealing material 6 is used to secondary seal between the base material 7 and the outer wall material 8. It is a thing.
[0022]
4 is a screw for fixing the base material 7 and the outer wall material 8, and the water blocking material 6 is bonded to the base material 7 through the adhesive layer 4 so that the easily water-soluble layer 1 ( A synovial membrane coat (not shown) is attached so as to be on the outer wall material 8 side.
[0023]
In the water stop structure illustrated in FIG. 5, the water stop material 6 is disposed between the base 11 and the base 12, and the water stop material 6 is bonded to the base 11 through the adhesive layer 4. The water-soluble layer 1 (the synovial coat is not shown) is attached so as to be in pressure contact with the base 12. On the other hand, in the water stop structure illustrated in FIG. 6, when the hood 13 is attached to the ventilation port 82 formed in the outer wall member 8 via a screw outside the figure, the water stop member 6 is attached to the peripheral portion 14 of the hood 13. A synovial membrane coat (not shown) is bonded via the adhesive layer 4 and interposed between the wall material 8.
[0024]
As described above, the water-stopping material of the present invention can be used between the above-described building members or between the opening forming material in the opening such as a ventilation opening and the attachment member to the same, or between the roof plate and the roof tile (roof base material). ), Between sashes and doors and their frames, etc., and preferably used in appropriate places requiring water-sealing treatment such as kitchen utensils such as sinks in the room, bathroom vanities, and sanitary items such as bathtubs and their supporting members. It is possible to easily form an appropriate water stop structure according to the application location with good workability.
[0025]
【Example】
Reference example 1
After applying an aqueous solution of polyvinyl alcohol having a saponification degree of about 70% to one side of a foam layer made of EPDM foam sheet having a thickness of 5 mm to form an easily water-soluble layer having a thickness of 0.03 mm, A butyl rubber adhesive layer having a thickness of 0.3 mm was provided on the other surface to obtain a sheet-like water-stopping material.
[0026]
Reference example 2
Aside from providing a 0.5mm thick butyl rubber adhesive layer on one side of the foam layer and adhering a 70% saponification polyvinyl alcohol film on it to provide a 0.03mm thick easily water-soluble layer A waterstop material was obtained according to Reference Example 1.
[0027]
Example 1
A waterstop material was obtained in the same manner as in Reference Example 2 except that a synovial film having a thickness of 0.01 mm made of a silicone release agent was provided on the water-soluble layer.
[0028]
Comparative Example 1
A waterproofing material was obtained by providing a butyl rubber adhesive layer having a thickness of 0.3 mm on one side of a foam layer having a thickness of 5 mm made of an EPDM foam sheet.
[0029]
Comparative Example 2
A waterstop material was obtained in accordance with Comparative Example 1 except that a butyl rubber adhesive layer having a thickness of 0.5 mm was provided on the other surface of the foam layer.
[0030]
Comparative Example 3
A waterstop material was obtained according to Comparative Example 2 except that a 0.03 mm thick separator obtained by treating a polyester film with a silicone release agent was provided on a 0.5 mm thick butyl rubber adhesive layer.
[0031]
After adhering the water-stopping material obtained in the evaluation test example and the comparative example to the plywood board through the 0.3-mm-thick butyl rubber-based adhesive layer, the outer wall panel was temporarily placed thereon to slightly correct the position. And screwed so that the compression rate of the foam layer was 60%. The water-stopping material was the entire adhesion between the plywood and the outer wall panel. In Comparative Example 3, the position of the outer wall panel was corrected, and the separator was peeled off and screwed. Moreover, the compression rate of the foam layer at the time of temporarily placing the outer wall panel was 50%.
[0032]
In the above, the re-separation property at the time of position correction after temporary placement of the outer wall panel, the slipping property at that time, the ease of position correction, and the occurrence of abnormalities such as deformation of the foam layer were examined. Further, the water sealability of the obtained screw stoppers at 50 mm hydrostatic pressure was examined immediately after assembly (initial product) and after standing at 80 ° C. for 7 days (heated product).
[0033]
The results are shown in the following table.

[0034]
From the table, in the examples, the mobility of the members, such as separation and side slip, is good at the time of position correction, the position can be easily corrected without abnormally deforming the water-stopping material, and the water sealability after assembly is also excellent. You can see that
[Brief description of the drawings]
[Fig. 1] Cross-sectional view of a water-stopping material example [Fig. 2] Cross-sectional view of another water-stopping material example [Fig. 3] Cross-sectional view of another water-stopping material example [Fig. FIG. 5 is a cross-sectional view of another example of a water-stopping structure. FIG. 6 is a cross-sectional view of still another water-stopping structure example.
6: Water-stopping material 1: Easily water-soluble layer 2: Foam layer 3, 4: Adhesive layer 5: Synovial coating 7: Base material 8: Outer wall material 10: Gasket 11: Foundation 12: Base 13: Hood

Claims (10)

At least the foam layer and Ri Na has a readily water layer, the water stopping material that readily water layer is characterized Rukoto which have a synovial coated on the outer surface. The waterstop material having an adhesive layer between the foam layer and the easily water-soluble layer according to claim 1. The waterstop material which has an adhesion layer on both surfaces of a foam layer in Claim 2. The waterstop material according to any one of claims 1 to 3 , wherein the foam layer is made of an EPDM foam. The waterstop material according to claim 2 , wherein the pressure-sensitive adhesive layer is made of a butyl pressure-sensitive adhesive. Water stopping material synovial coat Te one smells ing from the release agent of claims 1 to 5. Water shut-off structure characterized by being water-sealed by placing the water stopping material according to inter-member to one of claims 1 to 6. 8. The water stop structure according to claim 7, wherein the space between the members is between the base material and the outer wall member in the joint portion of the outer wall member, and the water-soluble layer of the water stop member is disposed on the outer wall member side. In Claim 7, Between members between a foundation and a foundation, or between other building members, or between a wall material and hood in a ventilation opening, or an opening formation material in other openings, and an attachment member to it Water stop structure that is between. A joint structure in which a gasket is attached to the joint of the outer wall material in the water stop structure according to claim 8.

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